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<H3><A NAME="M2">NAME</A></H3>
Tcl_SetRecursionLimit &mdash; set maximum allowable nesting depth in interpreter
<H3><A NAME="M3">SYNOPSIS</A></H3>
<B>#include &lt;tcl.h&gt;</B><BR>
int<BR>
<B>Tcl_SetRecursionLimit</B>(<I>interp, depth</I>)<BR>
<H3><A NAME="M4">ARGUMENTS</A></H3>
<DL class="arguments">
<DT><A HREF="../TclLib/Interp.htm">Tcl_Interp</A> <B>*interp</B> (in)<DD>
Interpreter whose recursion limit is to be set.
Must be greater than zero.
<P><DT>int <B>depth</B> (in)<DD>
New limit for nested calls to <B><A HREF="../TclLib/Eval.htm">Tcl_Eval</A></B> for <I>interp</I>.
<P></DL>
<H3><A NAME="M5">DESCRIPTION</A></H3>
At any given time Tcl enforces a limit on the number of recursive
calls that may be active for <B><A HREF="../TclLib/Eval.htm">Tcl_Eval</A></B> and related procedures
such as <B><A HREF="../TclLib/Eval.htm">Tcl_GlobalEval</A></B>.
Any call to <B><A HREF="../TclLib/Eval.htm">Tcl_Eval</A></B> that exceeds this depth is aborted with
an error.
By default the recursion limit is 1000.
<P>
<B>Tcl_SetRecursionLimit</B> may be used to change the maximum
allowable nesting depth for an interpreter.
The <I>depth</I> argument specifies a new limit for <I>interp</I>,
and <B>Tcl_SetRecursionLimit</B> returns the old limit.
To read out the old limit without modifying it, invoke
<B>Tcl_SetRecursionLimit</B> with <I>depth</I> equal to 0.
<P>
The <B>Tcl_SetRecursionLimit</B> only sets the size of the Tcl
call stack:  it cannot by itself prevent stack overflows on the
C stack being used by the application.  If your machine has a
limit on the size of the C stack, you may get stack overflows
before reaching the limit set by <B>Tcl_SetRecursionLimit</B>.
If this happens, see if there is a mechanism in your system for
increasing the maximum size of the C stack.

<H3><A NAME="M6">KEYWORDS</A></H3>
<A href="../Keywords/N.htm#nesting depth">nesting depth</A>, <A href="../Keywords/R.htm#recursion">recursion</A>
<div class="copy">Copyright &copy; 1989-1993 The Regents of the University of California.
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